Ok, amazed is a little strong but there's nothing wrong with some Saturday morning hyperbole. This picture is a quick and casual shot of my cat cuddling with my daughter (very rare moment). I had the 12-40mm lens attached set to aperture priority and also have auto ISO set.

The picture isn't the greatest in the world, but I noticed it was shot at ISO 3200 and the quality of the image surprised me. Yes, if I took my time and set everything properly I could have got away with ISO 800 but 3200 is quite usable.